diff --git a/cln_interceptor.go b/cln_interceptor.go
index a459824..02f6903 100644
--- a/cln_interceptor.go
+++ b/cln_interceptor.go
@@ -182,7 +182,7 @@ func (i *ClnHtlcInterceptor) mapFailureCode(original interceptFailureCode) strin
 	case FAILURE_TEMPORARY_NODE_FAILURE:
 		return "2002"
 	case FAILURE_INCORRECT_OR_UNKNOWN_PAYMENT_DETAILS:
-		return "4015"
+		return "400F"
 	default:
 		log.Printf("Unknown failure code %v, default to temporary channel failure.", original)
 		return "1007" // temporary channel failure
diff --git a/intercept.go b/intercept.go
index c4c2f3e..92edc0b 100644
--- a/intercept.go
+++ b/intercept.go
@@ -30,7 +30,7 @@ type interceptFailureCode uint16
 var (
 	FAILURE_TEMPORARY_CHANNEL_FAILURE            interceptFailureCode = 0x1007
 	FAILURE_TEMPORARY_NODE_FAILURE               interceptFailureCode = 0x2002
-	FAILURE_INCORRECT_OR_UNKNOWN_PAYMENT_DETAILS interceptFailureCode = 0x4015
+	FAILURE_INCORRECT_OR_UNKNOWN_PAYMENT_DETAILS interceptFailureCode = 0x400F
 )
 
 var payHashGroup singleflight.Group